Tubular level instrument and method of construction

Details Tubular level instrument and method of construction Tubular level instrument and method of construction

G - Physics

01

B

G01B 13/18 (2006.01) G01C 9/28 (2006.01)

Patent

CA 2094058

ABSTRACT A low-cost level instrument having precalibrated angle measuring vials and enhanced tensile strength, comprising injecting a hollow extruded aluminum frame placed in an associated mold with moldable structural foam plastic so that the plastic generally fills the frame, forming integral vial retention holders and end caps in the process. The vials are simply press fit into the vial retention holders for secure and precalibrated alignment with a measuring surface along the level instrument. The frame is preferably formed with a cross-section bearing an hourglass-shape in order to increase the strength of the level instrument and reduce the volume of plastic fill required.

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